android basic daydreams

parameters; //Use the value of the parameter taken from the specified shaderGles20.glenablevertexattribarray (Mapostionhandle);//Start drawingGles20.gldrawarrays (Gles20.gl_triangles,0,3); }}Step Three: Permission declarationsAfter the above two steps, the program can not run, you have to declare the appropriate permissions in the Androidmanifest.xml. uses-feature android:glEsVersion="0x00020000" android:required="true" />You can see the triangle by running the prog

Android two basic networking methods and the use of a third-party open-source project, android open-source projectThree methods for Android request networkWhen requesting the network, the commonly used submission method is post or get requests. THE post request is secure and the transmission size is not limited, but th

Android development-basic interface design knowledge, android Interface Design A good APP not only has beautiful and nice interfaces, but also requires good performance and stability. As a developer, you need to understand the interface design principles and write excellent interface design code. This chapter describes the use of

Basic knowledge required for Android layout: android Layout Eclipse environment variable Configuration: 1. In eclipse, choose Window --> preferences --> Android (Android can be viewed only when ADT is installed) --> SDK Location: import the SDK path 2. Configure platform-too

Basic tutorial on Android-10.14 Android GPS1. Locate related APIs 1) LocationManager Official API documentation: LocationManagerThis is a system service and cannot be new directly. You need: LocationManager lm = (LocationManager)getSystemService(Context.LOCATION_SERVICE); In addition, do not forget to add permissions for GPS positioning: Okay. After obtainin

Android applications are loosely coupled components and are bound together using the project manifest (mainifest).1.Activity and viewActivity is an Android application representation, and each screen in the application is an extension of the activity class. Activity uses view to form a graphical interface for displaying information and responding to user actions on a single screen,Multiple activity can be j

Basic Android tutorial -- 2.2.6 AbsoluteLayout (absolute layout) and android absolute LayoutBasic Android tutorial -- 2.2.6 AbsoluteLayout (absolute layout) Tags (separated by spaces): basic Android tutorialThis section introduces

the image so that the image is long (wide) equal to or greater than the length (width) of the viewCenter_inside/centerinside Displays the contents of the picture in full, by scaling it down or the original size to make the picture long/wide equal to or less than the length/width of the viewFit_center/fitcenter enlarge/Shrink the picture to the width of the view, centered on the displayFit_end/fitend Zoom in/out to the width of the view, displayed in the lower part of the viewFit_start/fitstart

Android-Baidu Map call (basic version), android-Map Previously I wrote an Android-Baidu Map call (retrieval function) because my company's projects are useful and I made some simple sharing. This article briefly introduces the basic map usage of Baidu map.Now the

Basic usage of Android search controls, android search controls In Android, search is a very core function. We can use it to search for any information we can obtain. The information can be the contacts, files, and other information stored on the mobile phone, or resources on the network. In order to provide users with

Friends to recommend to me the development of Android Learning course, is also starting from the Zero Foundation to learn, the feeling is very good, very easy to understand, now to share the following:This series of courses are divided into 3 stages: 450 hours, supporting 17 stage projects, five major Project Professional training quickly understand the entire AndroidSoftware development process and the use of related professional toolsCourses Accordi

Basic Android tutorial -- 13 Drawable types in Android 8.1.2 summary Part 2This section introduces: In this section, we continue to learn about Drawable resources in Android. In the previous section, we learned:ColorDrawable;NinePatchDrawable;ShapeDrawable;GradientDrawable! The four Drawable ~In this section, we will

Basic knowledge of Android [project training-achieve two-level navigation on the main interface] [3], android Training [This project training is a comprehensive exercise of basic Android knowledge. Note: some pictures and materials will be used in the project and they will b

Android callback function 1: Basic Concepts: android callback function 1. Concepts Client program C calls A function A in service program S, and then S calls A function B in C at some time. For C, this B is called A callback function. Generally, C does not call B by itself. C provides B for S to call it, and C has to provide it. Because S does not know who the B

Android self-study course-basic use of OkHttp and android course okhttp Some time ago, I learned how to use a subthread to obtain network images and update the main UI. I found that most of the demos are based on HttpClient, but google seems to have weakened HttpClient. I can only find the related classes of HttpURLConnection. No way, you can only find new ways.

the message, and update the information in the activityWhat kinds of Android life cycle do you have?1. foreground process. Such a process has an activity that is displayed on the screen and interacts with the user or one of its intentreciver is running. Such programs are of the highest importance, and only when the system is very low in memory will it end up as a last resort. 2. visible process. Programs that are displayed on the screen but are not

Before learning the use of the basic components in Android, this article, I will summarize the use of the layout in Android, see below in detail.1.LinearLayoutLinearlayoutyot, also known as linear layout, is a common layout that can be arranged horizontally and vertically. The previous blog post basically uses the vertical layout in the linear layout, the way of

From: http://www.cnblogs.com/mudoot/archive/2011/11/16/Writing_Efficient_Android_Code.html for postscript. There are two basic principles for a resource-consuming system: 　　　　Do not do unnecessary things 　　　　Do not allocate unnecessary memory 1. Avoid object Creation　　　　 Unless necessary, try to avoid the instance of the best effort object. When you extract a string from user input data, try to use the substring function to obtain a substring of the o

Basic knowledge of Android [project training-implementation of project structure and main interface] [4], android Training [This project training is a comprehensive exercise of basic Android knowledge. Note: some pictures and materials will be used in the project and they w

; Radiogroup> TableRow> TableRow> TextViewAndroid:layout_width= "Wrap_content"Android:layout_height= "Wrap_content"Android:text= "Hobby"android:textsize= "16pt" /> define a vertical linear layout - LinearLayoutandroid:layout_gravity= "Center_horizontal"android:orientation= "vertical"Android:layout_width= "Wrap_content"Android:layout_height= "Wrap_content" > define three check boxes - Che